JPH03170727A - Cooking appliance - Google Patents

Abstract

PURPOSE:To make the lightness of a lamp variable speedily in accordance with a set value by connecting the lamp in parallel to an electric heater and by connecting an output adjusting element in series to a parallel connection circuit thereof. CONSTITUTION:Dark-red translucent heat-resistant glass 3 formed of crystallized glass is fitted to the upper opening 2 of the main body 1 of an appliance, while two heaters 5 using nichrome wires 4, electric heating wires, as heaters are held inside the glass. In addition to the nichrome wires 4, halogen lamps 16 are fitted thereon and further overheat switches 17 are fitted on the lamps, respectively. Each halogen lamp 16 is connected in parallel to the nichrome wire 4, and one end 31a of a parallel connection circuit 31 of them is connected to one end of a power source 34 through an output adjusting element 33 and an electrification switch 35, while the other end 31b of the parallel connection circuit 31 is connected to the other end of the power source 34 through the overheat switch 17 and the electrification switch 35. According to this constitution, the lightness of the lamps 16 is varied speedily in accordance with a set value of the output adjusting element 33.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cooking appliance that uses a heating wire such as a nichrome wire as a heater.

(Prior Art) As a conventional cooking appliance of this kind, one that includes an electric heater and an output adjustment section that adjusts the output of the electric heater is known.

(Problem to be Solved by the Invention) However, according to the above-mentioned conventional method, when changing the setting value of the output adjustment section or starting energization, the response speed of the heating wire to the setting value changing operation is slow; Furthermore, although the electric heater becomes brighter when it is energized, the brightness does not change much even if the setting value is slightly changed, especially in appliances where the top surface of the casing to which the electric heater is attached is covered with heat-resistant glass (crystallized glass). Changes in the brightness of the electric heater can hardly be confirmed, and there is a disadvantage that the setting value changing operation does not match the visual change.

(Means for Solving the Problems) The present invention is directed to solving the above-mentioned disadvantages, and a cooking appliance according to claim 1 is a cooking appliance including an electric heater and an output adjustment section for adjusting the output of the electric heater. The present invention is characterized in that a lamp is connected in parallel to the electric heater, and the output adjustment section is connected in series to the parallel connection circuit.

The cooking device according to claim 2 is a cooking device which is provided with a casing to which an electric heater is attached and an output adjustment section for adjusting the output of the electric heater in the appliance body in which a heat-resistant glass is attached to the upper opening. The present invention is characterized in that a halogen lamp is attached to the casing, the halogen lamp is connected in parallel to the electric heater, and the output adjustment section is connected in series to the parallel connection circuit.

Furthermore, the cooking device according to claim 3 includes a casing in which an electric heater is attached within the appliance body in which a heat-resistant glass is attached to the upper opening, and an output adjustment section for adjusting the output of the electric heater.
In a cooking appliance equipped with a hot lamp equipped with a temperature detection element that detects the temperature of the heat-resistant glass, when the electric heater is energized, the hot lamp is connected in parallel to the electric heater, and the output is connected to the parallel connection circuit. The hot lamp is characterized in that the adjustment parts are connected in series, and when the electric heater is not energized, the temperature detection element is activated and the hot lamp is turned on independently of the electric heater.

(Function) The present invention is based on the above configuration, and when the cooking device according to claim 1 is used, when the set value of the output adjustment section is changed, the brightness of the lamp changes quickly in accordance with the set value.

Moreover, when the cooker according to claim 2 is used, when the set value of the output adjustment section is changed, the brightness of the halogen lamp changes quickly according to the set value, and this is visible through the heat-resistant glass and the brightness of the halogen lamp is changed. The heat can be used to heat food.

Furthermore, the cooker according to claim 3 utilizes a hot lamp that lights up when the temperature detection element detects that the temperature of the heat-resistant glass is higher than a predetermined value and serves as a caution lamp to prevent burns. When the electric heater is energized, if the set value of the output adjustment section is changed, the brightness of the hot lamp changes quickly in accordance with the set value. Further, when the electric heater is not energized, the hot lamp can be turned on by the temperature detection element even after the electric heater is turned off until the temperature of the heat-resistant glass falls below a predetermined value.

(Example) Next, embodiments of the present invention will be described based on the drawings.

In FIGS. 1 and 2, reference numeral 1 indicates the main body of a cooking device, and a dark red translucent heat-resistant glass 3 made of crystallized glass is attached to the top opening 2 of the main body 1. Two stoves 5 using nichrome wires 4 as heating wires as heaters are housed inside. The heat-resistant glass 3 is fitted into a frame 1 having a grille exhaust port 6 (not shown) at the rear.

The casing 8 of the stove 5 is provided with a heat insulating material 1L in a cylindrical frame 1O so that the heat generated from the nichrome wire inside is not dispersed but is concentrated in the upper opening 9. In addition to the nichrome wire 4, a halogen lamp 1B is attached thereon, and an overheat switch 17 is further attached thereon.

The support metal fittings l2 that support each stove 5 are fitted into and positioned in the spacer 14 that is fixed and erected by four screws l3 on the bottom of the appliance body 1, and the casing 8 of each stove 5 is Four springs 15 provided around the spacer l4 press the heat-resistant glass 3 and fix it.

The overheat switch 17 functions as a safety device to prevent overheating, and stops the output of the electric heater when the temperature exceeds a predetermined temperature.

A hot lamp 19 is provided on the front side of the instrument body 1 via an insulator 18. The hot lamp 19 lights up when the bimetal switch 20, which is a temperature detection element built into the overheat switch 17, detects a temperature of 60° C. or higher, to notify that the heat-resistant glass 3 has become hot, and serves to prevent burns. .

The cooker having such a configuration is controlled by a control circuit 30 shown in FIG.

The control circuit 30 connects the halogen lamp 1B in parallel with the nichrome wire 4, and connects one end 31a of the parallel connection circuit 3l to one end of the power supply 34 via the output adjustment section 33 and the energization switch 35, and also connects the parallel connection circuit 31 to one end of the power supply 34. Other end 3lb of circuit 3l
is connected to the other end of the power supply 34 via the overheat switch 17 and the energization switch 35, and the hot lamp l
9 is connected to a power source 34 via a bimetal switch 20.

The output adjustment section 33 includes an output setting section 32 having an operator (not shown), for example, a variable resistor whose resistance value changes by changing the set value by operating the operator. It is. In this case, when the set value is changed using the operator, for example, the resistance value of the output adjustment section 33 changes, which causes the nichrome wire 4 and the halogen lamp l to change.
Since the energizing current of 6 changes, the response speed of the nichrome wire 4 is slow, and the setting value changing operation can be represented by a rapid change in brightness of the halogen lamp 16 through the heat-resistant glass 3, and the setting value changing operation and the visual changes can be matched. Furthermore, the heat generated from the filament of the halogen lamp 1B can be used to heat the food placed on the heat-resistant glass 3.

4 and 5 show other embodiments of the present invention,
In this case, the stove 5 is provided with a hot wire 4 as a heater and an overheat switch 17 in the casing 8, and a hot lamp l9 is provided in the appliance body 1 outside the casing 8.
The embodiment is similar to the embodiments shown in FIGS. 1 to 3 above in that the embodiment 1. is provided, but the halogen lamp 1B is not used and the brightness of the hot lamp 19 is changed according to the set value. This embodiment is different from the embodiments shown in FIGS.

Briefly, when the nichrome wire 4 is energized with the energization switch 35 closed, the relay 40 is activated and the hot lamp 19 is connected in parallel with the nichrome t9I4, and the output adjustment section 33 is connected in series to the parallel connection circuit 4l. If connected and the set value is changed using the operator, even if the response speed of the nichrome wire 4 is slow, the set value change operation can be expressed as a rapid change in brightness of the hot lamp 19 through the heat-resistant glass 3. It is possible to match the setting value change operation with the visual change. Furthermore, when the nichrome wire 4 is de-energized by opening the energizing switch 35, the relay 40 becomes inactive and the hot lamp 19 is directly connected to the power source 34 via the bimetallic switch 20. The bimetallic switch 20 is closed and the hot lamp 19 is turned on until the temperature of the heat-resistant glass 3 becomes sufficiently low, in other words, until the temperature of the nichrome wire 4 falls below a predetermined value, so that the user can be warned of burns. .

Figure 6 shows a modification of the circuit shown in Figure 5, with relay 4
This circuit is not particularly different from the circuit shown in FIG. 5, except that 0 is not used and the bimetal switch 20 is made operable even when the nichrome wire 4 is energized.

Briefly, when the nichrome wire 4 is energized with the energization switch 35 closed, the switch 50 is closed, the switch 51 is opened, and the hot lamp 19 is connected in parallel to the nichrome wire 4.
is connected, the output adjustment section 33 is connected in series to the parallel connection circuit 52, and the setting value is changed using the operator.
The set value changing operation can be expressed by a quick change in brightness of the hot lamp 19, and the set value changing operation can be made to coincide with the visual temperature change. Also, energization switch 3
When the nichrome wire 4 with 5 open is not energized, the switch 50
is opened, the switch 51 is closed, and the hot lamp 19 is directly connected to the power supply 34 via the bimetal switch 2ro,
For example, even after cooking on the stove 5, the nichrome wire 4
bimetal switch 20 until the temperature of
Close it and turn on the hot lamp 19 at a constant brightness.
It can notify the user of burn hazards.

Although the spiral nichrome wire 4 was used as the electric heater, a sheath heater made by covering the spiral nichrome wire with an insulating material of magnesium oxide and further protecting it with a nickel pipe may also be used, or a thin sheet A seat heater made of a nichrome wire wired inside may also be used.

Although the nichrome wire 4 was used as the electric heater, a tungsten wire or the like may also be used.

Although the temperature detection element was a bimetal switch 20,
A thermistor or the like may also be used.

Note that the output adjustment section 33 may be a variable voltage regulator instead of a variable resistor.

(Effects of the Invention) As described above, when using the cooker of claim 1, the brightness of the lamp changes quickly according to the setting value of the output adjustment section, so a visual change corresponding to the setting change operation can be obtained. This has the effect of providing a cooking device that is more convenient to use than the conventional cooking device.

In addition, when using the cooker of claim 2, the brightness of the halogen lamp quickly changes according to the setting value of the output adjustment section, and the brightness inside the casing can be seen as changing through the heat-resistant glass. While using inexpensive electric wire as an electric heater, it is possible to obtain visual changes inside the casing that correspond to the user's action to change the set value. It has an effect that can be used for heating.

Furthermore, in the cooker of claim 3, when the electric heater is energized, the brightness of the hot lamp changes according to the set value of the output adjustment section, so that a visual change corresponding to the user's action to change the set value is obtained. In addition, when the electric heater is not energized, in combination with a temperature detection element, it has the effect of being able to perform the original function of the hot lamp.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing an example of the implementation of the present invention, Fig. 2 is a sectional view showing the stove part, Fig. 3 is a control circuit diagram thereof, and Fig. 4 is another embodiment of the invention. FIG. 5 is a control circuit diagram thereof, and FIG. 6 is a control circuit diagram of a modification of FIG. 5. 1... Instrument body 2... Top opening 3...
Heat-resistant glass 4... Nichrome wire (electric heater) 8... Casing ta... Halogen lamp l9... Hot lamp 2
0...Bimetal switch (temperature detection element) 3L 4
1, 52... Parallel connection circuit 33... Output adjustment section Fig. 5 Fig. 6 Fig. 3 Fig. 4

Claims (1)

[Claims] 1. In a cooking device equipped with an electric heater and an output adjustment section for adjusting the output thereof, a lamp is connected in parallel to the electric heater, and the output adjustment section is connected in series to the parallel connection circuit. A cooking device that is characterized by: 2. In a cooking appliance that has a casing with an electric heater attached inside the appliance body with heat-resistant glass attached to the top opening, and an output adjustment section for adjusting the output of the electric heater, a halogen lamp is attached to the casing. A cooking appliance characterized in that the halogen lamp is connected in parallel to the electric heater, and the output adjustment section is connected in series to the parallel connection circuit. 3. A device body with heat-resistant glass attached to the top opening includes a casing with an electric heater attached thereto, an output adjustment section that adjusts the output of the electric heater, and a temperature detection element that detects the temperature of the heat-resistant glass. In a cooking appliance equipped with a hot lamp, when the electric heater is energized, the hot lamp is connected in parallel to the electric heater, and the output adjustment section is connected in series to the parallel connection circuit, and the electric heater is connected in parallel. A cooking appliance characterized in that when electricity is not applied, the temperature detection element is activated and the hot lamp is turned on independently of the electric heater.